| Intangible assets other than goodwill [member] | |||||||||||
| Brand names [member] | Patentes [Miembro] | Knowhow [Miembro] | Intangible exploration and evaluation assets [member] | Computer software [member] | Licences and franchises [member] | Derechos [Miembro] | Service concession arrangements, classified as intangible assets [member] | Other intangible assets [member] | |||
| Disclosure of detailed information about intangible assets [abstract] | |||||||||||
| Descripción método de amortización, activos intangibles distintos de la plusvalía | |||||||||||
| Useful lives or amortisation rates, intangible assets other than goodwill | |||||||||||
| Reconciliation of changes in intangible assets other than goodwill [abstract] | |||||||||||
| Intangible assets other than goodwill | |||||||||||
| Additions other than through business combinations, intangible assets other than goodwill | |||||||||||
| Acquisitions through business combinations, intangible assets other than goodwill | |||||||||||
| Amortisation, intangible assets other than goodwill | |||||||||||
| Impairment loss recognised in profit or loss, intangible assets other than goodwill | |||||||||||
| Reversal of impairment loss recognised in profit or loss, intangible assets other than goodwill | |||||||||||
| Increase (decrease) through other changes, intangible assets other than goodwill | |||||||||||
| Disposiciones y retiros de servicio, activos intangibles distintos de la plusvalía [resumen] | |||||||||||
| Disposals, intangible assets other than goodwill | |||||||||||
| Retiros de servicio, activos intangibles distintos de la plusvalía | |||||||||||
| Total de disposiciones y retiros de servicio, activos intangibles distintos de la plusvalía | |||||||||||
| Disminuciones por clasificar como mantenidos para la venta, activos intangibles distintos de la plusvalía | |||||||||||
| Increase (decrease) in intangible assets other than goodwill | |||||||||||
| Intangible assets other than goodwill | |||||||||||